Improvement in wood-grinders



G. W. WELD.

Wood-Grinders.

$10,150,209, Patented A pril28,1874.

Wm w w UNITED STATES PATENT OFFICE.

CHARLES W. WELD, OF SOUTHBBIDGE, MASSACHUSETTS.

IMPROVEMENT IN WOOD-GRINDERS.

Specification forming part of Letters Patent No. 150,209, dated April 28, 1874; application filed March 14, 1874.

To all whom it may concern:

Be it known .thatl, CHARLES W. WELD, of

Southbridge, in the county of- Worcester,

State of Massachusetts, have; invented a certain new and useful Improvement in Wood- Grinders; of which the following is; a description sufficiently full, clear,and exact to enable any person skilled in the artor science to which my invention appertains to make and use the same, reference being had to the accom panying drawing, forming apart of this specification, in which--' Figure 1 is an isometrical perspective 'view ofmy improved machine. Fig. 2-is asectional' viewlof the same.

Like letters refer to like parts in the. diifer-- ent figures of the drawing.

My invention relates to that class of paperpulp machines which are used for converting wood into pulp by abrasion and consists ofa novel construction and arrangement of the parts, as hereinafter more fully set forth and claimed, by which new and important results are effected.

The extreme simplicity of my invention renders an elaborate description unnecessary.

In Fig. 1, Ais the bed-piece of the machine; B, the block-holder l,the pendulous-link to which the holder is attached; D, the cros'sar or shaft for supporting the link; E, uprights,

in which the cross-bar is disposed; G, thegrinding-stone, and F the block from which the pulp is produced. The block is inclined to the plane of the stone G, and arranged diagonallyiu the holder B, as shown in Fig. 2.

From the foregoing, the nature and operation of my invention will. be readily understood by all conversant with such matters.

In ordinary paper-pulp machines, in which poplar 'and similar woods are converted into pulp for the manufacture of paper, the woodis usually ground either directly across block being also inclined, or set an angle of about forty-five degrees to the grinding surface, over which it is moved, or by which it is ground. Y

By this arrangement, when the block is moved forward over the stone, the fibers of the wood are olled up, and partially separated 1 from the bl0ck,-the operation being completed by the return or opposite movement, without breaking .up and destroying the fibers to such an extent asoccurs in other processes of grinding.

venient means, and that power can be applied to vibrate the holder B, as preferred.

The block may be secured in substantially the same position described,and ground on a wheel, without departing from the spirit of my invention; but I prefer themethod shown.

Having thus described my invention, what I claim is- In a wood-pulp machine, the vibratory holder B, provided with means for holding the block diagonally inclined, as described, and combined to operate, with the stone G, substantially' as and for the purpose setforth.

CHARLES W. WELD. Witnesses I F, W. BOTHAN, J. N. CHAMBERLAIN, Jr.

It will be understood that the block may be secured in the holder B by-screws, or any 0011-. 

